Knotty problem plaque



FIG. 1 is a front elevational view of the knotty problem plaque of the present invention;

FIG. 2 is a back elevational view of the knotty problem plaque of FIG. 1;

FIG. 3 is a left side elevational view of the knotty problem plaque of FIG. 1;

FIG. 4 is a right side elevational view of the knotty problem plaque of FIG. 1;

FIG. 5 is a top plan view of the knotty problem plaque of FIG. 1;

FIG. 6 is a bottom plan view of the knotty problem plaque of FIG. 1; and,

FIG. 7 is a front elevational view of an alternate embodiment of the knotty problem plaque of the present invention. 

The ornamental design for a knotty problem plaque, as shown. 